56 lines
1.8 KiB
C#
56 lines
1.8 KiB
C#
/*
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* MinIO .NET Library for Amazon S3 Compatible Cloud Storage, (C) 2017 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System.Collections.Concurrent;
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using System.Text.RegularExpressions;
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namespace Minio.Helper;
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public static class RegionHelper
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{
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private static readonly Regex endpointRegex = new(@"s3[.\-](?<name>.*?)\.amazonaws\.com$",
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RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.RightToLeft,
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TimeSpan.FromHours(1));
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private static readonly ConcurrentDictionary<string, string> cache = new(StringComparer.Ordinal);
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/// <summary>
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/// Get corresponding region for input host.
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/// </summary>
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/// <param name="endpoint">S3 API endpoint</param>
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/// <returns>Region corresponding to the endpoint. Default is 'us-east-1'</returns>
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public static string GetRegionFromEndpoint(string endpoint)
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{
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if (!string.IsNullOrEmpty(endpoint))
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return cache.GetOrAdd(endpoint, GetRegionFromEndpointImpl);
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return string.Empty;
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}
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private static string GetRegionFromEndpointImpl(string endpoint)
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{
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if (!string.IsNullOrEmpty(endpoint))
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{
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var match = endpointRegex.Match(endpoint);
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if (match.Success)
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return match.Groups[1].Value;
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}
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return string.Empty;
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}
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}
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